package com.spring.boot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.cloud.openfeign.EnableFeignClients;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;

import com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsStreamServlet;

@SpringBootApplication
@EnableCircuitBreaker // 开启断路器功能，进行容错管理 或者 @EnableHystrix注解
@EnableDiscoveryClient // 开启服务发现功能,支持eureka,zk 注册中心;@EnableEurekaClient//只支持eureka
@EnableFeignClients
public class OrderApplication {

	@Bean // 注册一个具有容错功能的RestTemplate

	@LoadBalanced // 开启负载均衡客户端
	RestTemplate restTemplate() {
		return new RestTemplate();

	}

	@Bean
	public ServletRegistrationBean getServlet() {
		HystrixMetricsStreamServlet streamServlet = new HystrixMetricsStreamServlet();
		ServletRegistrationBean registrationBean = new ServletRegistrationBean(streamServlet);
		registrationBean.setLoadOnStartup(1);
		registrationBean.addUrlMappings("/hystrix.stream");
		registrationBean.setName("HystrixMetricsStreamServlet");
		return registrationBean;
	}

	public static void main(String[] args) {
		SpringApplication.run(OrderApplication.class, args);
	}

}
